【英文标准名称】:StandardTestMethodforDeterminingFractureEnergyofAsphalt-AggregateMixturesUsingtheDisk-ShapedCompactTensionGeometry
【原文标准名称】:用盘状紧凑拉伸几何物测定地沥青集料混合物断裂强度的标准试验方法
【标准号】:ASTMD7313-2007a
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D04.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:集料;地沥青;施工材料;测定;圆盘;能量;断裂;几何;混合物;道路建筑;抗拉荷载;测试
【英文主题词】:asphaltconcrete;crackgrowth;cracking;crackmouthopeningdisplacement;disk-shapedcompacttensiontest;fractureenergy;temperaturetest;Aggregate(pavementsurfaces);Cracking;Fracture
【摘要】:Thetestmethodwasdevelopedfordeterminingthefractureresistanceofasphalt-aggregatemixtures.Thefractureresistancecanhelpdifferentiatemixtureswhoseservicelifemightbecompromisedbycracking.Thetestmethodisgenerallyvalidforspecimensthataretestedattemperaturesof10x00B0;C(50x00B0;F)orbelow(seeNote1).Thespecimengeometryisreadilyadaptedto150-mmdiameterspecimens,suchasfabricatedfromSuperpave(trademark)gyratorycompactors(TestMethodD6925),thatareusedfortheasphaltconcretedesignprocess.Thespecimengeometrycanalsobeadaptedforforensicinvestigationsusingfieldcoresofpavementswherethinliftsarepresent.Thisgeometryhasbeenfoundtoproducesatisfactoryresultsforasphaltmixtureswithnominalmaximumaggregatessizerangingfrom4.75to19mm.Note18212;Thestiffnessoftheasphaltbindertendstoinfluencetheassessmentofavalidtestasdescribedin7.4.Forinstanceasoftasphaltbinder,whichmayberequiredforaverycoldclimatemightnotleadtoamixturethatwouldproducevalidresultsat10x00B0;Candconversely,ahardasphaltbinderutilizedinhotclimatesmayrequirehighertemperaturestoprovideanymeaningfulinformation.Note28212;Thequalityoftheresultsproducedbythistestmethodaredependentonthecompetenceofthepersonnelperformingtheprocedureandthecapability,calibration,andmaintenanceoftheequipmentused.AgenciesthatmeetthecriteriaofSpecificationD3666aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthistestmethodarecautionedthatcompliancewithSpecificationD3666alonedoesnotcompletelyassurereliableresults.Reliableresultsmaydependonmanyfactors;followingthesuggestionsofSpecificationD3666orsomesimilaracceptableguidelinesprovidesameansofevaluatingandcontrollingsomeofthosefactors.1.1Thistestmethodcoversthedeterminationoffractureenergy(Gf)ofasphalt-aggregatemixturesusingthedisk-shapedcompacttensiongeometry.Thedisk-shapedcompacttensiongeometryisacircularspecimenwithasingleedgenotchloadedintension.Thefractureenergycanbeutilizedasaparametertodescribethefractureresistanceofasphaltconcrete.Thefractureenergyparameterisparticularlyusefulintheevaluationofmixtureswithductilebinders,suchaspolymer-modifiedasphaltconcrete,andhasbeenshowntodiscriminatebetweenthesematerialsmorebroadlythantheindirecttensilestrengthparameter(AASHTOT322,Wagoner).Thetestisgenerallyvalidattemperaturesof10x00B0;C(50x00B0;F)andbelow,orformaterialandtemperaturecombinationswhichproducevalidmaterialfracture,asoutlinedin7.4.1.2Thespecimengeometryandterminology(disk-shapedcompacttension,DC(T))ismodeledafterTestMethodE399forPlane-StrainFractureToughnessofMetallicMaterials,AppendixA6,withmodificationstoallowfracturetestingofasphaltconcrete.1.3Thetestmethoddescribesthetestingapparatus,instrumentation,specimenfabrication,andanalysisproceduresrequiredtodeterminefractureenergyofasphaltconcreteandsimilarquasi-brittlematerials.1.4ThestandardunitofmeasurementforfractureenergyisJoules/meter2(J/m2)[inch-pound/inch2(in.-lbf/in.2)].1.5Thetextofthistestmethodreferencesnotesandfootnoteswhi......
【中国标准分类号】:Q13
【国际标准分类号】:93_080_20
【页数】:7P.;A4
【正文语种】: